Cylinder head for internal-combustion engines



'April 28, 1931.

E, w. EVANS CYLINDER HEAD FOR INTERNAL COMBUSTION ENGINES Filed May 19, 1928 QIIIU NVN. 29E 050 'I im!! '0....

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NNN Siu ESL hh 00 Patented Apr. 28, 1931 a UNITI-:D` STATES EARLE W. EVANS, F LINDEN, NEW-JERSEY, ASSIGNOR TO STANDARD OID Param OFFICE DEVEL- OPMENT COMPANY, A GQRPORATION 0F I)E'LAWALBAE- cYLnmEn. YHEAD non. INTEa-NAL-coMBUsToN ENGINES.

Application led Hay 19, 1928, Serial No. 278,930. l

I This invention relates to a form of cylinder head for internal combustion engines and l will be understood from the \following dewhich /I have invented;

scription read in conjunction with the annexed drawings, in which Fig. 1 is a fragmentary cross section through a preferred form of the cylinder head Fig. 2 is a vertical section through the same on the broken plane denoted by. the line I-I on Fig. 1; and

Fig. 3 isa vertical section through the same on the broken plane denoted by the line II--II on Fig. 1L.

Referring to the. drawings, each piston chamber 1 contains a piston 2 of circular cross section. Each piston chamber is in communication through a passage 3, with a valve chamber 4, in which are located intake valve 5 and exhaust valve 6. 'It will be noted that exhaust valve 6 is adjacent the point of communication between the two chambers so th'at substantially all of the charge passing to the piston chamber from the intake valve 5 will pass directly 'over the exhaust valve, thereby simultaneously cooling the exhaust valve and preheating the charge. valve chamber is preferably only slightly wider than the exhaust valve, so as to concentrate the ow of the charge over that valve.

Details of construction will be apparent from Figs. 2 and 3.

. I provide a subordinate or auxiliary means of communication between the piston chainber 1 and the valve chamber 2. This con-lr sists of a by-pass 9 of substantialh7 smaller cross section than the passage 3. Therefore, most of the charge indrawn through the intake valve passes over the exhaust valve as described above. construction, the ignition of the charge, whether propagated in thevalve chamber or piston chamber, is communicated` through two separate and distinct channels. In the preferred form of construction with this alternative device, I place an ignition means 7 in the by-pass 9 whereby an explosion of the charge during operation is immediately communicated to both the valve bers.

and pistoncham- The outlet of the^ However, in this form oi4 The foregoing specific description'is for purposes of illustration and not by way 'of limitation. Itis my intention that the invention be limited only by the appended claims or their equivalents in which I have exdeavored to claim broadly all inherent nove ty. l

I claim:

1. In an internal combustion engine, a piston chamber, a valve chamber, an intake and an exhaust valve in said valve chamber, a passage between the said piston chamber and the said valve chamber adjacent the said ex'- haust valve and so formed that the` major part of the charge indrawn through the said intake valve passes over the said exhaust valve, and a by-pass connecting the said piston chamber with the said valve4 chamber at --a point-remote from the said exhaust valve,

. ber communicating through an opening of lesser diameter than theiirst mentioned open'- ing and disposed on the far side of the intake valve from the exhaust valve.

4. In an internalcombustion engine, a piston chamber, a valve chamber, an intake and an exhaust valve in the valve chamber, the

vallve chamber having an opening on the far side of the exhaust valvev from the intake valve and communicating with the piston chamber, the piston chamber and valve chamber communicating through an opening of lesser diameter tharfirst mentioned opening and disposed on the far side of the intake valve from the exhaust valve, and an ignition means disposed in the last mentioned opening.

5. In an internal combustion engine, a piston chamber, a valve chamber, an intake and als Lan exhaust valve in the valve chambei', the valve chamber having an opening on the far side of the exhaust valve from the intake valve and communicating with the piston chamber, a passageway connecting the piston 4chamber and valve chamber on the far side ofthe intake valve from theI exhaust valve and of lesser diameter than the opening, and ignition means disposed in the passageway. l

6. Inq an internal combustion engine, a pistn chamber, a valve chamber, an intake and an exhaust valve in the valve chamber, the

valve chamber having an opening on the far side of the exhaust valve from the intake valve and communicating with the piston chamber, the portion of the wall of the valve chamber adjoining the exhau'stvalve con'-A latten,

ver toward the gmg EARLE W. EVANS.

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